| MD | Players | Nationality | DOB | A(D) |
|---|---|---|---|---|
| 14-Oct-2017 | Zac Mercer | England | 28-Jun-1997 | 20(108) |
| 14-Oct-2017 | Max Clarke | England | 03-Oct-1996 | 21(11) |
| 14-Oct-2017 | Sam Underhill | England | 22-Jul-1996 | 21(84) |
| 14-Oct-2017 | Charlie Ewels | England | 29-Jun-1995 | 22(108) |
| 20-Oct-2017 | Beno Obano | England | 25-Oct-1994 | 22(361) |
| 14-Oct-2017 | Anthony Watson | England | 26-Feb-1994 | 23(230) |
| 14-Oct-2017 | Elliot Stooke | England | 10-Sep-1993 | 24(34) |
| 20-Jan-2018 | Lucas Noguera Paz | Argentina | 05-Oct-1993 | 24(107) |
| 14-Oct-2017 | Tom Dunn | England | 12-Nov-1992 | 24(336) |
| 14-Oct-2017 | Nicholas Auterac | England | 12-Nov-1992 | 24(336) |
| 14-Oct-2017 | Josh Lewis | Wales | 22-Mar-1992 | 25(206) |
| 12-Jan-2018 | Henry Thomas | Wales | 30-Oct-1991 | 26(75) |
| 14-Oct-2017 | Jonathan Joseph | England | 21-May-1991 | 26(147) |
| 14-Oct-2017 | Chris Cook | England | 16-Apr-1991 | 26(182) |
| 14-Oct-2017 | Toby Faletau | Wales | 12-Nov-1990 | 26(337) |
| 20-Jan-2018 | Freddie Burns | England | 13-May-1990 | 27(252) |
| 09-Dec-2017 | Max Lahiff | England | 09-Dec-1989 | 28(0) |
| 09-Dec-2017 | Ben Tapuai | Australia | 19-Jan-1989 | 28(324) |
| 09-Dec-2017 | Paul William Grant | New Zealand | 27-Oct-1987 | 30(44) |
| 09-Dec-2017 | Matthew Garvey | England | 23-Oct-1987 | 30(48) |
| 14-Oct-2017 | Semesa Rokoduguni | England | 28-Aug-1987 | 30(48) |
| 20-Jan-2018 | James Phillips | England | 27-Sep-1987 | 30(116) |
| 20-Oct-2017 | Rhys Priestland | Wales | 07-Jan-1987 | 30(287) |
| 09-Dec-2017 | Matt Banahan | England | 30-Dec-1986 | 30(345) |
| 14-Oct-2017 | Aled Brew | Wales | 09-Aug-1986 | 31(67) |
| 16-Dec-2017 | Francois Louw | South Africa | 15-Jun-1985 | 32(184) |
| 20-Oct-2017 | Luke Charteris | Wales | 09-Mar-1983 | 34(226) |
| 14-Oct-2017 | Anthony Perenise | Samoa | 18-Oct-1982 | 34(362) |
| 20-Oct-2017 | Kahn Fotuali'i | Samoa | 22-May-1982 | 35(152) |
MD = Match date,
DOB = Date of birth,
A(D) = Age(days).